Part 6, Section E.6 states:
"If set the validator will look for the URL of the CRL Distribution Point in the Certificate and use the OCSP (RFC 6960) to determine if the Certificate has been revoked."

RFC 6960 states, that the location of the OSCP responder is not in crlDistributionPoint but in the der authorityInformationAccess Extension:
https://tools.ietf.org/html/rfc6960#section-3.1
„ In order to convey to OCSP clients a well-known point of information
access, CAs SHALL provide the capability to include the authority
information access extension (defined in [RFC5280], Section 4.2.2.1)
in certificates that can be checked using OCSP. Alternatively, the
accessLocation for the OCSP provider may be configured locally at the
OCSP client.“